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采用普通铸渗工艺制备了具有蜂窝型陶瓷芯板的WC颗粒增强高铬铸铁基复合材料,陶瓷芯板厚度达到15～20 mm.通过金相显微镜、XRD等分析手段研究了复合材料界面结构及物相组成,由于WC颗粒边缘与高温铁水发生溶解扩散反应形成过渡层,使得基体与增强颗粒之间形成了良好的冶金结合.利用三体磨料磨损试验机测试了带有蜂窝孔复合材料的磨损性能,结果表明:磨损过程中,复合材料体积磨损量随着磨损过程的进行逐渐减少;复合材料的三体磨损性能与热处理态高铬铸铁标样相比有较为明显的提高,热处理态与铸态复合材料的耐磨性相差不大.
WC granule reinforced high chromium cast iron matrix composite with honeycomb ceramic core plate was prepared by ordinary casting and infiltration process.The thickness of the ceramic core plate was 15-20 mm.The interfacial structure of composites and the interface structure of composites were studied by means of metallographic microscope and XRD, Due to the dissolution and diffusion reaction between the edge of WC particles and high temperature hot metal, the transition layer formed, resulting in a good metallurgical bond between the matrix and the reinforcing particles.The wear of honeycomb composite with three-body abrasive wear tester The results show that during the process of wear, the wear volume decreases with the wear process. The three-body wear properties of the composites are obviously improved compared with that of the heat treated high chromium cast iron. The composite material wear resistance is not much difference.